Designed by Marco Voltolini, Benibara (meaning "red rose" in Japanese) is a stunning 5-fold radial faceting design that offers magnificent light performance and visual depth.
Tailored for an 80-index gear, this design works beautifully on Quartz (R.I. = 1.540) as well as higher refractive index materials like Garnet, Tourmaline, Topaz, and Sapphire.
Design Specifications
| Parameter | Specification Details |
|---|---|
| Design Name | Benibara ("Red Rose") |
| Author | Marco Voltolini |
| Target RI | R.I. = 1.540 (Quartz, Garnet, Tourmaline & Higher) |
| Facet Count | 45 + 10 girdles = 55 total facets |
| Symmetry / Index | 5-fold radial symmetry | 80 Index Gear |
| Proportions | L/W=1.051 | P/W=0.441 | C/W=0.217 |
| Volume Ratio | Vol./W³ = 0.223 |
Step-by-Step Cutting Angles
1. Pavilion Cutting Sequence
| Facet | Angle | 80-Index Settings | Instruction / Meet Point |
|---|---|---|---|
| 1 | 40.00° | 04-08-12-20-24-28-36-40-44-52-56-60-68-72-76 | Cut to centerpoint. |
| 2 | 90.00° | 80-16-32-48-64 | Set stone size. |
| 3 | 90.00° | 08-24-40-56-72 | Meet 1. |
| 4 | 63.42° | 80-16-32-48-64 | Level girdle. |
2. Crown Cutting Sequence
| Facet | Angle | 80-Index Settings | Instruction / Meet Point |
|---|---|---|---|
| A | 39.84° | 80-16-32-48-64 | Set girdle thickness. |
| B | 29.00° | 02-18-34-50-66 | Meet girdle. |
| C | 20.83° | 04-20-36-52-68 | Meet A. |
| D | 12.33° | 10-26-42-58-74 | Meet B. |
| E | 36.97° | 08-24-40-56-72 | Meet C. |
Suitable Gemstone Materials
Benibara translates to "red rose," making rich red and pink gemstones ideal choices for this design:
- Garnet (Pyrope, Almandine, Rhodolite): Recommended material to showcase the rose-like petal brilliance.
- Quartz Family (RI 1.54): Amethyst, Rose Quartz, and Citrine.
- Higher RI Gems: Tourmaline, Topaz, Spinel, and Sapphire.
Explore more custom faceting diagrams and precision lapidary guides on Horizon Gems!
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